metamorphic
Unakite
Altered Granite (Epidotized Granite)
Hardness: 6-7 on Mohs scale. Color: Mottled green (epidote) and pink (orthoclase feldspar) with clear quartz. Luster: Vitreous to dull. Crystal structure: Granular, massive. Cleavage: Distinct in feldspar components. Specific gravity: 2.5-3.0.
- Hardness
- 6-7 on Mohs scale
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Mottled green (epidote) and pink (orthoclase feldspar) with clear quartz. Luster: Vitreous to dull. Crystal structure: Granular, massive. Cleavage: Distinct in feldspar components. Specific gravity: 2.5-3.0.
Formation & geological history
Formed through hydrothermal alteration (epidotization) of granite, where hot fluids alter the original plagioclase feldspar into epidote.
Uses & applications
Used for making cabochons, beads, carved spheres, tumbled stones, and decorative ornamental items.
Geological facts
First discovered in the Unaka Mountains of North Carolina, from which it gets its name.
Field identification & locations
Easily identified by its distinct pink and green color combination. Found worldwide, particularly in the Blue Ridge Mountains of the US and South Africa.
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